package task15;

/**
 * Create by IntelliJ IDEA
 *
 * @author: jsonor
 * @date-Time: 2018/4/13 10:15
 * @description:抽象类
 */
public abstract class Printer {

  public void compter(){
    System.out.println("Hello");
  }

  public abstract void open();
  public abstract void print();
  public abstract void close();
}
